All Confused HELP!!!

Secondly, this is the part of the harness which goes to the orange box? I have removed it to install the 6AL shown. My question here is do I still need the red wire and the yellow wire and where do they go? . What is the black wire? And most important, do I just bundle up the orange box plug and not worry about any of those wires? Keep in mind that I have completed the MAD voltage install and have the heavy red and black wires run directly thru the bulkhead holes I drilled.View attachment 1714943356

Can't tell for sure, I believe the brown goes down to the brake warning switch down below the master on the brake distribution

Yellow should be "start" on the starter relay. Red goes to the "big stud" on the starter relay. If you untape the harness you can eliminate the big connector for the ignition